*{
  padding: 0;
  margin: 0;
  list-style: none;
  box-sizing: border-box;
}
.box{
  width: 800px;
  height: 400px;
  background-color: #8E8C8E;
  margin: 20px auto;
  padding: 15px;
}
.box_{
  width: 100%;
  height: 100%;
  border: 5px solid #FFA303;
  background: #B4B3B4;
}